US10867592B2 - Curtain providing a barrier against light, noise, heat, fire and electromagnetic radiation - Google Patents

Curtain providing a barrier against light, noise, heat, fire and electromagnetic radiation Download PDF

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US10867592B2
US10867592B2 US15/738,374 US201615738374A US10867592B2 US 10867592 B2 US10867592 B2 US 10867592B2 US 201615738374 A US201615738374 A US 201615738374A US 10867592 B2 US10867592 B2 US 10867592B2
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curtain
curtain according
textile
fire
layer
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US20180182368A1 (en
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Jesús ALBA FERNANDEZ
Romina MARÍA DEL REY TORMOS
Vicente Jorge SANCHÍS RICO
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Universidad Politecnica de Valencia
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Universidad Politecnica de Valencia
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47H—FURNISHINGS FOR WINDOWS OR DOORS
    • A47H23/00—Curtains; Draperies
    • A47H23/02—Shapes of curtains; Selection of particular materials for curtains
    • A47H23/08—Selection of particular materials
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C2/00—Fire prevention or containment
    • A62C2/06—Physical fire-barriers
    • A62C2/10—Fire-proof curtains
    • B32B17/064—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/024—Woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/028—Net structure, e.g. spaced apart filaments bonded at the crossing points
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/88—Insulating elements for both heat and sound
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials
    • G10K11/168—Plural layers of different materials, e.g. sandwiches
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G10/00—Treatment rooms or enclosures for medical purposes
    • A61G10/005—Isolators, i.e. enclosures generally comprising flexible walls for maintaining a germ-free environment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0276—Polyester fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/72—Density
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/73—Hydrophobic

Definitions

  • the present invention relates to the field of protection against radiations and the like, and more specifically protection against electromagnetic radiations, light, heat, sound and fire. More specifically, the invention relates to a curtain having all the aforementioned types of protection.
  • Protection against different types of radiations and the like is required in different technical fields, such as for blocking mobile phone signals in hospitals and control centers, reducing external noises in outdoor performances, blocking electromagnetic signals in means of transport such as airplanes, etc.
  • patent document ES 1119330 discloses a solid panel with heatproof, soundproof, flameproof and electromagnetic-proof properties.
  • This panel is intended for being incorporated inside a wall or the like for its application in construction, for example.
  • this panel provides a suitable solution to different types of radiations, it must, however, be permanently installed inside a construction structure.
  • This panel does now allow for the quick and simple transport, assembly and disassembly thereof in a desired location for temporarily blocking said radiations.
  • Patent document US20140034415 discloses a sound insulation material, such as a curtain. Although this material is easy to transport and install, the acoustic protection it provides is insufficient. Furthermore, it does not provide another type of protections, such as protection against electromagnetic radiation and fire, for example.
  • an insulation material having a smaller weight such that it can be easily transported, installed and uninstalled, such as a curtain, for example.
  • said insulation material it would be desirable for said insulation material to provide protection against different types of radiations and the like, such as protection against light, noise, heat, fire and electromagnetic radiations.
  • the insulation provided by said material for example sound insulation, to be greater than that obtained with the materials of the prior art.
  • the present invention discloses a curtain providing a barrier against light, noise, heat, fire and electromagnetic radiations.
  • the curtain of the present invention comprises:
  • the curtain of the present invention furthermore has a total thickness of only between 0.5 cm and 3 cm, such that it is easy to handle, transport, install and uninstall in a given location.
  • the curtain of the present invention is applicable in a wide variety of fields.
  • the curtain of the present invention can be used in generic applications for cancelling out mobile phone signals, reducing noise, increasing energy efficiency, maintaining the fire resistance and opacity of the site in which they are installed, etc.
  • the present invention can also be applied in medicine, as it can provide a physical separation between hospital beds, reduce different types of interferences in areas of operating rooms, etc.
  • the present invention can also be applied in nurseries for newborns, in which the best acoustic and thermal conditions for newborns can be assured, particularly in very noisy NICU environments, and providing electromagnetic protection with respect to the environment.
  • the present invention can also be applied in rooms in general, conditioning one room at a given time (for example for meetings and conferences) and at the same time preventing noise from mobile phones and other systems. Since it is movable, it can be deployed or folded up, when required, and can act as an element for separating different environments without having to perform any construction work.
  • Another field of application of the curtain according to the present invention may be the scientific field, since it allows converting any room into an anechoic electromagnetic chamber.
  • Tent-type portable electromagnetic chambers or the like can be generated.
  • the present invention may be applicable in outdoor performances, reducing background noise and interferences in different types of events.
  • the present curtain can also be applied in means of transport as a movable element to perform separation, to reduce a mobile phone signal, etc.
  • FIG. 1 is a schematic illustration of the structure of the curtain according to the preferred embodiment of the present invention.
  • FIGS. 2A, 2B and 2C are graphs showing the sound absorption coefficient of curtains according to the preferred embodiment of the present invention in various configurations.
  • FIG. 3 is a graph showing the standardized airborne sound insulation of a curtain according to the preferred embodiment of the present invention.
  • FIG. 4 is a diagram showing the configuration of an in situ noise test for a curtain according to the preferred embodiment of the present invention.
  • FIGS. 5A and 5B are graphs showing the in situ standardized sound insulation of a curtain ( FIG. 5A ) and two curtains ( FIG. 5B ) according to the preferred embodiment of the present invention using the configuration shown in FIG. 4 .
  • FIG. 6 is a graph showing the reverberation time obtained in a room without a curtain and with curtains according to the preferred embodiment of the present invention.
  • FIG. 7 is a graph showing the sound pressure level obtained in a room without a curtain and with curtains according to the preferred embodiment of the present invention.
  • FIG. 8 is a graph showing the electromagnetic insulation obtained with a curtain according to the preferred embodiment of the present invention.
  • the composition of a protective curtain according to the preferred embodiment of the present invention is first described in reference to the attached FIG. 1 .
  • the curtain comprises two textile layers ( 10 , 10 ′), an inner layer ( 12 ) and a cover layer ( 14 ) adjacent to the outer side of one of the textile layers ( 10 ′).
  • Each of the textile layers ( 10 , 10 ′) has a combination of non-woven textile material and woven textile material.
  • the non-woven textile material is of the known type, such as felt, the thickness of which is preferably 3 mm to 20 mm and the density of which is preferably kg/m 3 to 40 kg/m 3 .
  • the woven textile material preferably has a density of 100 g/m 2 to 300 g/m 2 .
  • the materials of the textile layers ( 10 , 10 ′) can be made of natural fibers, synthetic fibers and combinations thereof, selected from the group consisting of cotton, linen, polypropylene, polyester, jute, polyamide, rayon, nylon, PVC, etc.
  • the woven textile material of the textile layers ( 10 , 10 ′) is subjected to at least a fire-proofing treatment. Said treatment is performed by means of covering the layers with a kind of acrylic resin.
  • the specific covering material depends on the fiber used in making the textile layers ( 10 , 10 ′), and can be polyvinyl chloride if polyethylene terephthalate fibers are used for making the textile layers, for example.
  • It can also be selected from any one of the group consisting of tetrakis(hydroxymethyl)phosphonium salt (preferably insoluble with ammonia gas) for cotton, diammonium phosphate/ammonium sulfate/boron compound, or hexapropoxyphosphazene for rayon, oligomeric phosphate for polyester, thiourea/titanium and zirconium compound/dibromoterephthalic acid for nylon, etc.
  • tetrakis(hydroxymethyl)phosphonium salt preferably insoluble with ammonia gas
  • diammonium phosphate/ammonium sulfate/boron compound or hexapropoxyphosphazene for rayon
  • oligomeric phosphate for polyester
  • thiourea/titanium and zirconium compound/dibromoterephthalic acid for nylon, etc.
  • the textile layers ( 10 , 10 ′) are also subjected to a water-proofing treatment and an oil-proofing treatment (the person skilled in the art will understand that depending on the desired application, said layers may be subjected to other treatments known in the art).
  • the water-proofing treatment is based on paraffin emulsions with aluminum salts which are applied by means of plasma surface treatment or padding. Another type of water-proofing treatment can also be performed, for example, by means of silicones and the like, or by means of any other method known by the persons skilled in the art.
  • the application of the oil-proofing treatment is widely known in the art and is described, for example, in patent document ES 2 266 172 T3.
  • the inner layer ( 12 ) is formed by sound insulation wool with a thickness between 3 mm and 1 cm and a density between 10 kg/m 3 and 50 kg/m 3 .
  • Said sound insulation wool can be of different types, such as polyester wool, for example. According to other embodiments of the present invention, it can also be of other wools similar to polyester wool and comprising at least 80% of a compound selected from the group comprising PP, PES and PET.
  • the cover layer ( 14 ) provides the property as a barrier against electromagnetic radiations and is formed by a metal selected from the group consisting of aluminum and copper and has a thickness between 0.5 mm and 5 mm. If the thickness of the cover layer ( 14 ) were less than 0.5 mm, there would be a risk of the layer breaking, which would negatively affect the acoustic, thermal and electromagnetic insulation of the final curtain. On the other hand, a thickness of this cover layer ( 14 ) greater than 5 mm would substantially increase the final weight of the curtain, making the handling and transport thereof excessively complicated.
  • the cover layer ( 14 ) furthermore has a glass fiber mesh reinforcement.
  • the cover layer ( 14 ) has, for example, a special coat such as an LDPE coat and the like.
  • the curtain of the present invention can include additional layers that are different from or identical to the layers described above.
  • the curtain comprises a second inner sound insulation layer, identical to the inner layer ( 12 ) described above, sandwiched between the textile layer ( 10 ′) and the cover layer ( 14 ) adjacent thereto.
  • the final structure of the curtain according to this embodiment will be textile layer+inner layer+textile layer+second inner layer+cover layer.
  • the curtain has a total thickness of all the layers combined comprised between 0.5 cm and 3 cm, more preferably the curtain has a total thickness of 1 cm. If the curtain were to have a thickness less than 0.5 cm, it would not be viable since the amount of materials would not be sufficient. In contrast, if the total thickness of the curtain were greater than 3 cm, it would be too heavy and hard to handle.
  • the total weight of the curtain according to the preferred embodiment of the present invention is preferably 1 kg/m 2 .
  • the curtain according to the preferred embodiment of the present invention is lightweight, and therefore easy to transport and install/uninstall, thereby allowing its application in a number of situations in which multiple temporary protection (at least against light, noise, heat, fire and electromagnetic radiations) is required by means of quickly and simply installing the curtain, as well as subsequently uninstalling it in a similarly quick and simple manner.
  • Material of the textile layers 200 g/m 2 100% creased polyester.
  • Material of the inner layer Polyester wool with a grammage of 250 g/m 2 and a thickness of 8 mm.
  • Material of the cover layer 1 mm inner aluminum sheet.
  • the complete curtain had a thickness of 1 cm.
  • the opacity of the curtain can be seen with the naked eye. Nevertheless, a test was performed according to the ISO 105-B02 standard, obtaining a light fastness of 5 (on a scale of 1 to 8).
  • sound insulation In the case of sound insulation, it is important to take into account that simply increasing the number of layers or the thickness thereof alone does not necessarily lead to an improvement, but rather it may even reduce the final sound insulation properties of the curtain. In fact, sound insulation depends on the combination of materials and the order of the combination thereof.
  • the acoustic properties of a material or a set of materials depends on a number of factors: mechanical properties of the materials, chemical properties, bending properties, resistance properties, etc.
  • Configuration 1 Two curtains according to the preferred embodiment of the present invention were used. The first curtain was placed 5 cm from the wall and the second curtain was placed 15 cm from the first curtain (i.e., 20 cm from the wall).
  • Configuration 2 A single curtain located 5 cm from the wall was used.
  • Configuration 3 A single curtain located 20 cm from the wall was used.
  • the UNE-EN ISO 11654:1998 standard establishes a method for obtaining a single parameter: ⁇ w (weighted sound absorption coefficient). This parameter is used for evaluating the degree of absorption provided by a material. Depending on the value of said parameter, the standard makes a distinction between 6 classes of materials shown below in Table II:
  • the ASTM C423-09a standard includes two parameters that are not contemplated in the preceding standards.
  • the first parameter is the sound absorption average (SAA), representing the mean one-third octave from 200 Hz to 2500 Hz, rounded to multiples of 0.01.
  • the second parameter is the noise reduction coefficient (NRC), defined as the mean value of the absorption coefficients of the material at frequencies of 250, 500, 1000 and 2000 Hz and expressed as the nearest multiple of 0.05.
  • SAA sound absorption average
  • NRC noise reduction coefficient
  • the curtain placed 5 cm from the wall can absorb 65% (0.65) of the sound according to the European criterion or 85% (0.85) according to the American criterion.
  • the same curtain absorbs 100% of the sound according to the European criterion or 95% according to the American criterion.
  • the curtain has the maximum acoustic rating of “A”. If two curtains are used (configuration 1), maximum absorption in both criteria is assured and the maximum rating of “A” is exceeded.
  • a single curtain according to the present invention placed at 20 cm assures virtually complete sound absorption, whereas the combined use of two curtains assures complete sound absorption.
  • the UNE-EN ISO 140-3:1995 standard defines the sound reduction index, R, expressed with one decimal place and in dB, as sound insulation value. This index depends on the area of the sample, the equivalent sound reabsorption area in the receiving room and the isolation between rooms D, according to the following formula:
  • weighting “w” is defined in the UNE EN ISO 717-1: 1997 standard.
  • the ASTM E90-09 standard is in turn based on transmission loss. This parameter is equivalent to the sound reduction index, R, described above and is calculated the same way.
  • UNE-EN ISO 140-4:1999, UNE-EN ISO 140-14:2005 and UNE-EN ISO 3382-2:2008 standards were performed according to the UNE-EN ISO 140-4:1999, UNE-EN ISO 140-14:2005 and UNE-EN ISO 3382-2:2008 standards to evaluate in situ sound insulation and noise reduction of the curtain according to the present invention.
  • Configuration 1 A curtain according to the present invention used as a separation.
  • Configuration 2 Two curtains according to the present invention used as a separation, located 20 cm from one another.
  • FIG. 4 schematically shows the configuration used in these tests.
  • the emitting room (on the right side of the drawing) had a volume of 34.7 m 3
  • the receiving room (on the left side of the drawing) had a volume of 30.3 m 3 .
  • the curtain according to the present invention was located separating both rooms (white area in the center of the drawing).
  • the microphones were all located more than 0.7 m from one another, and more than 0.5 m from the edges of the room and more than 1 m from the sound sources.
  • the sound sources (F 1 and F 2 ) are located more than 0.7 m from one another, as well as more than 0.5 m from the edges of the room.
  • the areas marked with a grid in FIG. 4 represent the perimeter at 1 m from each of the sources, in which no microphone can be placed.
  • the areas marked with stripes represent the perimeter at 0.5 m from the walls, in which neither microphone nor sound source can be placed.
  • the value of the normalized level difference, D n the standardized level difference, D nT , or the apparent sound reduction index, R′, must be provided.
  • the values of the weighted standardized level difference, D nTA , and the weighted apparent sound reduction index, R′ A (the weighted values are obtained according to the UNE EN ISO 171-1 standard), will be presented in this case.
  • FIG. 6 shows the results of the reverberation time under various conditions (the control represents the test without using a separating curtain, R represents the measurements obtained in the receiving room and E represents the measurements obtained in the emitting room). It can be seen that placing the curtain according to the present invention considerably reduces the “echo” of the room, the annoying “echo” now being at values that are suitable for an office, for example.
  • the mean reverberation time it goes from 1.4 s without a curtain to 0.5-0.7 s with a curtain, which is a value that is very suitable for use.
  • FIG. 7 shows the results (the control represents the test without using a separating curtain).
  • placing the curtain according to the present invention reduces the noise level with respect to a fixed reference source.
  • a weighted noise level reduction of 3 dB is produced, which is equivalent to reducing the noise by half.
  • Electromagnetic tests were performed in an anechoic electromagnetic chamber.
  • the references of the antennas used in the test are the following: Double Ridged Waveguide Horn—model DRH400 and Quad Ridged Horn Antenna—model QRH500.
  • the tested bandwidth covered from 400 MHz to 6 GHz (mobile telephony, Wi-Fi, WiMax and other bandwidths of interest) to assess the effectiveness thereof in a wide range.
  • FIG. 8 shows the results of the transmission test. Very high attenuation, exceeding 50 dB even in the configuration with a single curtain, can be seen. It must be taken into account that for designing an electromagnetic chamber the mean attenuation of the wedges is about 40 dB, which means that these curtains according to the present invention can be used as mobile electromagnetic chambers.
  • the curtain according to the present invention does not shield a specific band, such as certain electronic or mobile telephony noise, but rather has a very wide shielding spectrum (from 400 MHz to 6 GHz), thereby neutralizing the electromagnetic waves of not only mobile telephony signals, but also Wi-Fi signals, WiMax signals and other signals of interest.
  • a specific band such as certain electronic or mobile telephony noise
  • An anechoic radiofrequency chamber is a room with a metal shielding in its walls, emulating a Faraday cage.
  • the chambers are designed with materials for absorbing electromagnetic waves for the purpose of insulating the chamber against any type of external influence and simulating free space conditions therein.
  • These chambers have a number of applications in the field of telecommunications, such as the measurement of the specific absorption rate (SAR) of mobile terminals, or the design and characterization of radiating elements, such as antenna and dipoles, for example.
  • SAR specific absorption rate
  • materials are classified with respect to their reaction to fire in classes referred to as M0, M1, M2, M3 and M4. These classes indicate the relative magnitude with which the corresponding materials can favor fire development.
  • M0 material that is not combustible in response to the normalized thermal action of the test (glass, stone and ceramic materials, metals, gypsums, rock wool, etc.).
  • M1 material that is combustible but not flammable, which means that combustion does not hold when heat is no longer supplied from an external hot spot (PVC, glass wool, DM, formica, flameproof varnishes, etc.).
  • M2 material with a low degree of flammability (wood).
  • M3 material with a medium degree of flammability (wood).
  • M4 material with a high degree of flammability.
  • a test was performed to determine the behavior of a curtain according to the present invention in the event of fire, and the curtain was classified as Class 1 (M1) according to said UNE-EN 13773:2011 standard.
  • the thermal insulation of a curtain according to the present invention was tested according to the UNE-EN ISO 8894-1:2010 standard.
  • a 1-cm thick curtain was used in the test and a thermal resistance of 0.13 m 2 K/W was obtained.
  • a material is considered a “thermal insulation material” if it has a thermal resistance greater than 0.25 m 2 K/W. Therefore, the curtain according to the present invention has a value very close to that for being considered a “thermal insulation material”.
  • a curtain according to another embodiment of the present invention having a thickness of 2 cm (or the use of two curtains according to the present invention, each having a thickness of 1 cm), has a thermal resistance of 0.26 m 2 K/W.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Architecture (AREA)
  • Acoustics & Sound (AREA)
  • Civil Engineering (AREA)
  • Electromagnetism (AREA)
  • Structural Engineering (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Multimedia (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)
  • Laminated Bodies (AREA)
US15/738,374 2015-07-03 2016-06-22 Curtain providing a barrier against light, noise, heat, fire and electromagnetic radiation Active 2037-03-07 US10867592B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ES201530961A ES2548068B2 (es) 2015-07-03 2015-07-03 Cortina de barrera frente a la luz, al ruido, al calor, al fuego y a las radiaciones electromagnéticas
ES201530961 2015-07-03
ESP201530961 2015-07-03
PCT/ES2016/070469 WO2017005948A1 (es) 2015-07-03 2016-06-22 Cortina de barrera frente a la luz, al ruido, al calor, al fuego y a las radiaciones electromagnéticas

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US20180182368A1 US20180182368A1 (en) 2018-06-28
US10867592B2 true US10867592B2 (en) 2020-12-15

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Publication number Priority date Publication date Assignee Title
US20230209791A1 (en) * 2021-12-29 2023-06-29 Siemens Healthcare Gmbh Curtain and Shielded Chamber for Shielding an Electromagnetic Field
US11784688B1 (en) * 2018-05-03 2023-10-10 Cable Television Laboratories, Inc. Methods and systems for wireless communication in a reflective environment

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Publication number Priority date Publication date Assignee Title
FR3069767B1 (fr) * 2017-08-02 2019-08-16 Objectif Silence Rideau antibruit composite
WO2023181001A1 (en) * 2022-03-24 2023-09-28 Eleda S.R.L. A piece of furniture or a textile element

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11784688B1 (en) * 2018-05-03 2023-10-10 Cable Television Laboratories, Inc. Methods and systems for wireless communication in a reflective environment
US20230209791A1 (en) * 2021-12-29 2023-06-29 Siemens Healthcare Gmbh Curtain and Shielded Chamber for Shielding an Electromagnetic Field

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EP3318687A4 (en) 2019-03-20
PT3318687T (pt) 2021-05-03
WO2017005948A1 (es) 2017-01-12
ES2548068B2 (es) 2016-02-26
ES2548068A1 (es) 2015-10-13
EP3318687B9 (en) 2021-08-11
EP3318687B1 (en) 2021-03-17
EP3318687A1 (en) 2018-05-09
WO2017005948A8 (es) 2017-03-02
ES2869278T3 (es) 2021-10-25
US20180182368A1 (en) 2018-06-28

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